57281399 has 8 divisors (see below), whose sum is σ = 66293760. Its totient is φ = 48476376.

The previous prime is 57281377. The next prime is 57281423. The reversal of 57281399 is 99318275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57281399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57281359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51239 + ... + 52344.

It is an arithmetic number, because the mean of its divisors is an integer number (8286720).

Almost surely, 2^57281399 is an apocalyptic number.

57281399 is a deficient number, since it is larger than the sum of its proper divisors (9012361).

57281399 is a wasteful number, since it uses less digits than its factorization.

57281399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103669.

The product of its digits is 136080, while the sum is 44.

The square root of 57281399 is about 7568.4475951149. The cubic root of 57281399 is about 385.4823862894.

The spelling of 57281399 in words is "fifty-seven million, two hundred eighty-one thousand, three hundred ninety-nine".